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Finding the Fourth Proportional to 145,619.60, 218,256.60 and 61,379.60

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Solution

The fourth proportional to 145,619.60, 218,256.60 and 61,379.60 is: 91,996.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,619.60 : 218,256.60 = 61,379.60 : x
  2. Step 2: Convert to fraction form
    145,619.60/218,256.60 = 61,379.60/x
  3. Step 3: Cross multiply
    145,619.60x = 218,256.60 × 61,379.60
  4. Step 4: Simplify right side
    145,619.60x = 13,396,502,805.36
  5. Step 5: Solve for x
    x = 13,396,502,805.36/145,619.60
  6. Step 6: Final answer
    x = 91,996.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.